#include <stdio.h>
int
main(int argc, char *argv[])
{
int i;
char c, *str;
str = argv[1];
for (i = 0; str[i] != '\0'; ++i) {
if (65 <= str[i] && 90 >= str[i]) {
c = ((str[i] - 65 + 13) % 26) + 65;
putchar(c);
}
if (97 <= str[i] && 122 >= str[i]) {
c = ((str[i] - 97 + 13) % 26) + 97;
putchar(c);
}
if (32 == str[i]) {
c = str[i];
putchar(c);
}
}
putchar('\n');
return 0;
}